drainage conditions
Technical term used in civil engineering, agriculture, and environmental contexts to describe the state or quality of water drainage in a given area.
The drainage conditions of this land are not very good.
We built a new waterway to improve the drainage conditions.
排水 means 'drainage' or 'draining water' in general, while 排水条件 specifically refers to the conditions or state of drainage.
条件 means 'conditions' or 'terms' broadly; 排水条件 narrows it to drainage-related conditions.
Compound of 排水 (drainage) and 条件 (conditions).